the courts ruled that restricting access to materials necessary for a free press was a direct infringement of the First Amendment.

I understand this would be used as supporting precedent for an RKBA lawsuit, should the government try to artificially inflate the cost of ammo, based on the same legal premise

What if they called it a “Trauma Tax” and used the money to fund Trauma Centers where gunshot victims are treated. While I still would oppose the tax it would seem they could argue that it was not intended as a punitive action against gun owners.

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A major source of objection to a free economy is precisely that it ... gives people what they want instead of what a particular group thinks they ought to want. Underlying most arguments against the free market is a lack of belief in freedom itself.
- Milton Friedman